8387138493 has 16 divisors (see below), whose sum is σ = 12516092160. Its totient is φ = 5550609888.

The previous prime is 8387138491. The next prime is 8387138533. The reversal of 8387138493 is 3948317838.

8387138493 is a `hidden beast` number, since 83 + 8 + 71 + 3 + 8 + 493 = 666.

8387138493 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8387138493 - 2¹ = 8387138491 is a prime.

It is a super-2 number, since 2×8387138493² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8387138491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1130005 + ... + 1137402.

It is an arithmetic number, because the mean of its divisors is an integer number (782255760).

Almost surely, 2^8387138493 is an apocalyptic number.

It is an amenable number.

8387138493 is a deficient number, since it is larger than the sum of its proper divisors (4128953667).

8387138493 is a wasteful number, since it uses less digits than its factorization.

8387138493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267553 (or 2267547 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 8387138493 is about 91581.3217473956. The cubic root of 8387138493 is about 2031.7546924877.

The spelling of 8387138493 in words is "eight billion, three hundred eighty-seven million, one hundred thirty-eight thousand, four hundred ninety-three".